An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful.
Gm is G, Bb and D — G with the third lowered a semitone.
It sounds darker than a major triad, and just as settled. The i of a minor key, and the vi, ii or iii of a major one.

| G | Bb | D |
|---|---|---|
| 1 | ♭3 | 5 |
Tonic — minor chords rest as readily as major ones.
Also written Gmin, G- or G minor. The same chord either way; which spelling you meet depends on who wrote the chart.
An open string left ringing against a fretted grip. It costs no finger, so it can sound a note the closed shape has none left for: a tension on top, or a pedal root underneath.
These belong to their key rather than to a shape: they cannot be moved up the neck. D, A, G and E have many; E♭ has a handful.
Gm has 3 of them, on the bottom four strings, the top four strings and strings 6-4-3-2, from the 3rd fret up to the 5th — every inversion the chord has: Bb in the bass and D in the bass. The one to learn first is the Bb shape at the 5th fret, which is the easiest grip here.
Start with xx5786 — no barre and low, at the 5th fret. 1 of the 9 shapes here sits in open position. 3 of the 9 need a barre. Together they cover the neck from the 1st fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 310033 | open position | G, root position | G | barred |
| 355333 | 3rd fret | G, root position | G | barred |
| xx5333 | 3rd fret | G, root position | G | barred |
| xx5786 | 5th fret | G, root position | Bb | all fretted |
| xx8786 | 6th fret | Bb, 1st inversion | Bb | all fretted |
| x-10-8-7-8-x | 7th fret | G, root position | G | all fretted |
| x-10-12-12-11-10 | 10th fret | G, root position | D | all fretted |
| x-13-12-12-11-x | 11th fret | Bb, 1st inversion | Bb | all fretted |
| 15-13-12-12-x-15 | 12th fret | G, root position | G | all fretted |
The same notes rebuilt from scratch give 48 triad voicings, each on its own page.
How you get to it. The turn that lands on Gm is Am7♭5 to D7♭9: the ii and the V of G minor, which is where a minor tonic is usually arrived at rather than simply begun on.
In which keys. Every note of Gm belongs to C minor (the v), D minor (the iv), Eb major (the iii), F major (the ii), G minor (the i) and Bb major (the vi).
Every note of Gm is in G minor pentatonic, G blues, G dorian, G natural minor and G phrygian.
Change one note of Gm and you have G (the minor third becomes a major third), Gdim (the fifth becomes a flat fifth), Gsus2 (the minor third becomes a ninth), Gsus4 (the minor third becomes a fourth), Gm6 (add the sixth) or Gm7 (add the flat seventh).
Gm is a minor chord — root, minor third, fifth. Minor chords on every root.
On Gm’s sound and use this page follows Edward Aldwell & Carl Schachter, Harmony and Voice Leading (Schirmer / Cengage, 4th ed., 2011). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.